This enables building java for aarch64. Most of the configuration bits
were copied from arm.
=== libjava Summary ===
# of expected passes 2533
# of unexpected failures 29
# of untested testcases 25
Andreas.
* configure.ac (aarch64-*-*): Don't disable java.
* configure: Regenerate.
libjava/:
* configure.host: Add support for aarch64.
* sysdep/aarch64/locks.h: New file.
libjava/classpath/:
* native/fdlibm/ieeefp.h: Add support for aarch64.
---
configure | 2 ++
configure.ac | 2 ++
libjava/classpath/native/fdlibm/ieeefp.h | 8 +++++
libjava/configure.host | 8 ++++-
libjava/sysdep/aarch64/locks.h | 57 ++++++++++++++++++++++++++++++++
5 files changed, 76 insertions(+), 1 deletion(-)
create mode 100644 libjava/sysdep/aarch64/locks.h
diff --git a/configure b/configure
index d809535..e161cad 100755
--- a/configure
+++ b/configure
@@ -3272,6 +3272,8 @@ esac
# Disable Java if libffi is not supported.
case "${target}" in
+ aarch64-*-*)
+ ;;
alpha*-*-*)
;;
arm*-*-*)
diff --git a/configure.ac b/configure.ac
index 48ec1aa..bec489f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -611,6 +611,8 @@ esac
# Disable Java if libffi is not supported.
case "${target}" in
+ aarch64-*-*)
+ ;;
alpha*-*-*)
;;
arm*-*-*)
diff --git a/libjava/classpath/native/fdlibm/ieeefp.h
b/libjava/classpath/native/fdlibm/ieeefp.h
index c230bbb..7ef2ae7e 100644
--- a/libjava/classpath/native/fdlibm/ieeefp.h
+++ b/libjava/classpath/native/fdlibm/ieeefp.h
@@ -4,6 +4,14 @@
#ifndef __IEEE_BIG_ENDIAN
#ifndef __IEEE_LITTLE_ENDIAN
+#ifdef __aarch64__
+#ifdef __AARCH64EB__
+#define __IEEE_BIG_ENDIAN
+#else
+#define __IEEE_LITTLE_ENDIAN
+#endif
+#endif
+
#ifdef __alpha__
#define __IEEE_LITTLE_ENDIAN
#endif
diff --git a/libjava/configure.host b/libjava/configure.host
index 0c3b41c..96f86fe 100644
--- a/libjava/configure.host
+++ b/libjava/configure.host
@@ -81,6 +81,11 @@ ATOMICSPEC=
# This case statement supports per-CPU defaults.
case "${host}" in
+ aarch64*-linux*)
+ libgcj_interpreter=yes
+ sysdeps_dir=aarch64
+ ATOMICSPEC=-fuse-atomic-builtins
+ ;;
arm*-elf)
with_libffi_default=no
PROCESS=Ecos
@@ -224,7 +229,8 @@ case "${host}" in
x86_64*-linux* | \
hppa*-linux* | \
m68k*-linux* | \
- sh-linux* | sh[34]*-linux*)
+ sh-linux* | sh[34]*-linux* | \
+ aarch64*-linux*)
can_unwind_signal=yes
libgcj_ld_symbolic='-Wl,-Bsymbolic'
if test x$slow_pthread_self = xyes \
diff --git a/libjava/sysdep/aarch64/locks.h b/libjava/sysdep/aarch64/locks.h
new file mode 100644
index 0000000..f91473d
--- /dev/null
+++ b/libjava/sysdep/aarch64/locks.h
@@ -0,0 +1,57 @@
+// locks.h - Thread synchronization primitives. AArch64 implementation.
+
+#ifndef __SYSDEP_LOCKS_H__
+#define __SYSDEP_LOCKS_H__
+
+typedef size_t obj_addr_t; /* Integer type big enough for object */
+ /* address. */
+
+// Atomically replace *addr by new_val if it was initially equal to old.
+// Return true if the comparison succeeded.
+// Assumed to have acquire semantics, i.e. later memory operations
+// cannot execute before the compare_and_swap finishes.
+inline static bool
+compare_and_swap(volatile obj_addr_t *addr,
+ obj_addr_t old,
+ obj_addr_t new_val)
+{
+ return __sync_bool_compare_and_swap(addr, old, new_val);
+}
+
+// Set *addr to new_val with release semantics, i.e. making sure
+// that prior loads and stores complete before this
+// assignment.
+inline static void
+release_set(volatile obj_addr_t *addr, obj_addr_t new_val)
+{
+ __sync_synchronize();
+ *addr = new_val;
+}
+
+// Compare_and_swap with release semantics instead of acquire semantics.
+// On many architecture, the operation makes both guarantees, so the
+// implementation can be the same.
+inline static bool
+compare_and_swap_release(volatile obj_addr_t *addr,
+ obj_addr_t old,
+ obj_addr_t new_val)
+{
+ return __sync_bool_compare_and_swap(addr, old, new_val);
+}
+
+// Ensure that subsequent instructions do not execute on stale
+// data that was loaded from memory before the barrier.
+inline static void
+read_barrier()
+{
+ __sync_synchronize();
+}
+
+// Ensure that prior stores to memory are completed with respect to other
+// processors.
+inline static void
+write_barrier()
+{
+ __sync_synchronize();
+}
+#endif
--
1.8.2.1
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
